SRS Labs SR560 manual Gain Mode, Output, Reset, Status

Page 13

OPERATION AND CONTROLS

information on using filters with the amplifier in AC coupled mode.

Gain Mode

The allocation of gain throughout the instrument is set using the GAIN MODE pushbutton The Gain Mode is displayed by two indicator LED’s: HIGH DYNAMIC RESERVE and LOW NOISE. For a given gain setting, a HIGH DYNAMIC RESERVE allocates the SR560's gain toward the output stages after the filters. This prevents signals, which are attenuated by the filters from overloading the amplifier. The LOW NOISE setting allocates gain toward the front-end in order to quickly "lift" low-level (nV range) signals above the instrument's noise floor.

Gain

The instrument's gain is increased or decreased using the GAIN pushbuttons. Gain settings from 1 to 50,000 are available and are displayed as the product of a factor 1, 2 or 5 and a multiplier (none (i.e. 1), 10, 100, 1,000 or 10,000). In addition to these fifteen fixed gain settings, the user may specify arbitrary gains through the UNCAL feature. To set an uncalibrated or arbitrary gain the user must press both Gain buttons simultaneously, lighting the UNCAL LED. In this mode by pressing the Gain Up or Gain Down pushbuttons, the user may reduce the calibrated gain in roughly 1% increments from 100% down to 0% of the selected gain. In contrast to other front-panel functions, when in UNCAL the instrument's key-repeat rate will start slowly and increase to a limit as long as either Gain button is depressed. Simultaneously pressing both Gain buttons once again will restore the unit to the previously calibrated gain setting, and turn off the UNCAL LED.

Output

The outputs of the instrument are located within the OUTPUT section of the front panel. Two insulated BNCs are provided: a 600Ω output and a 50Ω output. The amplifier normally drives high impedance loads and the instrument's gain is calibrated for high impedance loads. When driving a 600Ω load via the 600Ω output (or a

50Ω load via the 50Ω output) the gain of the amplifier is reduced by two. The shields of all the front-panel BNC’s are connected together and form the amplifier's floating ground.

Reset

The OVLD LED indicates a signal overload. This condition can occur when a signal is too large or the dynamic reserve is too low. Reducing the gain, reducing the input signal and/or switching to the HIGH DYNAMIC RESERVE setting should remedy this condition. If an overload occurs with filter settings of long time constants, the RESET pushbutton will speed the SR560's recovery from overload.

Status

The ACT LED indicates communications activity over the SR560's optoisolated RS-

232 port. Please refer to Appendix A: Remote Programming for further details on programming the instrument via RS-232.

The BLANK LED indicates the optoisolated BLANKING input (on the rear panel of the SR560) is active. The SR560 responds to a blanking input by internally grounding the amplifier signal path after the front end and before the first filter stage.

9

Page 12 Page 14
Image 13
Page 12 Page 14
Contents Model SR560 Page Table of Contents Calibration and Repair PCB SR560 Revision F 9/89 SchematicsAppendix a Appendix BInstrument Overview Introduction and SetupPreparation for USE Repackaging for Shipment Accessories FurnishedUse in Biomedical Applications Environmental ConditionsPage SR560 LOW-NOISE Preamplifier Specifications Chart SpecificationsSpecifications Operation and Controls PowerFront Panel Operating Summary SourceFilters Reset Gain ModeGain OutputAmplifier Power Output AC Power InputBattery Charger Rear Panel Operating SummaryBattery Care Battery Care and UsageBlanking Input RS-232 InterfaceAvoid Deep Discharge Circuit Description Configurable Filters and GainDifferential LOW-NOISE Front END Output StagesOverload Detection Battery Charger and PRE-REGULATORSMicroprocessor Rear Panel Interfaces Power RegulatorsFront Panel Batteries and P.E.MFront END Replacement Offset AdjustmentCalibration and Repair CalibrationBattery Replacement SR560 Offset Adjustment ProcedureFuse Replacement Noise Contours Dynamic Reserve Input Voltage NoiseMaximum Calibration and Repair Appendix a CommandsRemote Programming IntroductionAppendix a Noise Sources and Cures Appendix BIntrinsic Noise Sources Non-Essential Noise SourcesInductive Coupling Capacitive CouplingMicrophonics Resistive Coupling or ‘Ground Loops’Thermocouple Effect Appendix B Front Panel Parts List SR560 Component Parts ListMain Board Parts List 22U MIN 01U Axial 804 00225-548 Insl MTP5N05 SR560 Component Parts List SR560 Component Parts List PIN Mach SR566 Assy Adhes Tape Miscellaneous Parts List SR560 Component Parts List

SR560 specifications

SRS Labs SR560 is a cutting-edge audio enhancement technology that has gained recognition for its ability to deliver an immersive sound experience. Built upon years of research, the SR560 utilizes proprietary algorithms to achieve high-fidelity sound output while maintaining an incredibly dynamic range.

One of the most notable features of the SR560 is its adaptive audio processing, which adjusts sound dynamics based on the content being played. This means that whether one is listening to music, watching a movie, or playing video games, the sound quality is optimized in real-time to provide the best listening experience. The SR560 excels at enhancing dialogue clarity in films, ensuring that important audio elements are never lost amidst background sounds.

Another key characteristic of the SR560 is its support for multi-channel audio. With the rise of surround sound systems, the SR560 is designed to integrate seamlessly with 5.1 and 7.1 speaker setups. This ensures that users can enjoy a true surround sound experience, where each audio channel is processed independently to create a lifelike auditory environment. The SR560’s processing capabilities allow it to convert standard stereo audio into multi-channel output, enriching the listening experience for any audio format.

SRS Labs has equipped the SR560 with advanced bass optimization technology. This feature enhances low-frequency sound, providing deep, rich bass without distortion. Whether it’s the thumping beats of music or the rumble of action-packed movies, the SR560 ensures that users can experience the full spectrum of audio without compromising on quality.

Furthermore, the SR560 showcases state-of-the-art sound management features that provide users with customizable audio profiles. This allows users to tailor their audio experience according to personal preferences, whether they prefer a more balanced sound, enhanced bass, or boosted treble frequencies. The intuitive interface ensures that adjustments can be made effortlessly.

In conclusion, the SRS Labs SR560 stands out as a versatile audio enhancement technology that caters to the needs of various audio consumers. By combining adaptive processing, multi-channel support, bass optimization, and customizable profiles, the SR560 ensures a rich and immersive audio experience. As the demand for high-quality sound continues to rise, the SR560 is poised to remain a significant player in the evolution of audio technology.
Top Page Image Contents